You should expect to pay somewhere in the region of £250 (the price will vary, depending on the exact boiler model you have). Accompanying these hands-on courses are the manufacturer's installation, service, repair, and fault finding instructions. Fortunately, all components carry out obvious actions and in most instances will share basic functions with its counterpart in other combi boilers. Many components are ‘fit and forget' and require no servicing, although it is always good intuitive to check for imminent component failure whenever it is possible. The boiler can then be reset to clear the E160 fault code. Your boiler needs a clear airway to operate correctly. If it is the thermostat that’s tripping, then it’s going to need to be replaced. The Fix: The diaphragm washer can … If the boiler goes above 3 bar, or below 0.5 bar, it will lock out. But I can't find steps to solve this (I tried to restart the thermostat). Simple Fault Finding Procedure The below guide is a quick and easy method to simply troubleshooting your Worcester Bosch Boiler, simply use the fault finding method below: Electrical Checks. Some combi boilers have a built-in diagnostic system that illuminates LEDs or neon's, either on the control board or the user panel. The E384 fault code can be fixed by first, determining the exact cause of the problem. The gas valve is an electrical, but also mechanical component. Instead, they can isolate the problem to boiler. If they are faulty, they will need to be replaced by a Gas Safe boiler repair engineer. These thermistors monitor the temperature of water, to and from the boiler. Sometimes, the damage is minor. The problem is that the combi boiler is failing in its comfort role. Analyse the electrical circuits by using a multimetre inspecting for for short circuits, earth continuity and earth resistance. In fact, the fan is so important, that the boiler won’t fire up until it gets a signal to say that the fan is operating. Fault Finding Charts and Tables The troubleshooting manuals below is an easy step by step process to fault find your Baxi Combi Boiler. Boiler Fault finding logic. It is important to understand which kind of system that you have before you start any type of fault finding or maintenance. However, if your gas valve is beyond repair, you’ll need a replacement. They’re causing fluctuations in return pipe temperature, and that’s confusing the PCB. When fault finding in a combi boiler, use a logical and personal approach which includes collecting evidence, analysing evidence, locating the fault, establishing the cause of the fault, repairing the fault, and checking the system. If the fan is faulty, it’s going to need replacing. The most obvious explanation for this, is that the gas valve is faulty. For example, if the fan is running but there is no ignition, the fault is at or after the fan but before the boiler firing. If you accidentally top up water pressure to above 1.5 bar, it can be released. Your boiler engineer will start by checking that the ignition lead and probe are in good condition. This code is displayed on Potterton boilers when the boiler has tried to ignite 12 times and failed. It’s likely these are the culprits. If you’ve got a Worcester boiler that’s overheating it could be caused by things such as a faulty fan, pump, blocked PRV or even a condensate blockage. That’s going to cause a gas supply issue that could be dangerous. For example, a small connection could have come loose, and re-securing that connection is going to fix the problem. The fact that it’s just the NTC thermistor on the return side, helps to narrow down the problem quickly. The E163 fault code isn’t one that can be fixed on a DIY basis. They’ll then reset the boiler on your behalf when they’ve fixed the fault. When they notice a temperature differential between the two sensors that is too high or low, they’ll lock out the boiler and display a fault code. That’s not just at the point of delivery (for example, radiators or taps) to prevent scalding, but also to ensure all parts in the boiler are operational. Damage can occur to these wires from boiler vibrations, water and even old age. In this case, the PCB needs to be tested. But, the E40 fault code is specific. It’s the thermistor on the return side (water coming back to the boiler via pipework to be re-heated) causing the problem. single speed, two speed, three speed, modulating, twin pump, and five or six metre head. They’ll be checking for things such as the pump being seized, air locks, and even electrical power. And, if you have a leak, it could be damaging your property (for instance, pipework beneath floorboards, leaking over plaster), or your boiler (for instance, the heat exchanger is leaking onto electrical components). However, if the overheat is genuine, your boiler engineer is going to need to focus on anything that affects the circulation of water. Instead of attempting DIY fixes, speak to a boiler repair company instead. The pump will be working too hard to circulate water and could burn out. If they think the valve needs replacing, it’s likely to cost around £300. In most cases, it’s wires and connections that are the culprits. Whichever fault diagnosis procedure is used, the objective is always to achieve: So, don’t top up your boiler, until the leak has been fixed by a qualified engineer. In some cases, we’ve found the problem is electrical, but other contributing factors aren’t helping. Fault Error: The boiler will display an alphanumeric fault code to indicate the fault group. If the supply of gas isn’t the problem, it could be a sensing fault. But, it’s important not to start replacing parts until every possibility has been ruled out. For instance, the ST620WBC from Salus, is designed specifically for Worcester boilers, and not any other brands. A logical approach is required to quickly track down, isolate, and repair the fault. Typically, this is a gas supply issue. The problem is that the combi boiler is failing in its comfort role. Typically, anything that affects the circulation of water is going to be something your heating repair engineer needs to look at. They’ll then fit a boiler filter, to stop sludge build-up happening in the future. Boiler Manufacturers' instructions give detailed service procedures but most servicing can be carried out with a good comprehensive knowledge of that type of combi boiler. The quick fix here, is to have a Gas Safe engineer replace the NTC thermistor. Making Boiler Fault Finding Easier. Permanent pilot, intermittent pilot, fully automatic, or zero governor. These are mechanical parts, and mechanical parts wear out over time. When the fault is established and found it can then be easily repaired. The code is generated by the boiler’s printed circuit board(PCB). All mechanical and electrical appliances eventually breakdown and need to be repaired or replaced, central heating boilers and combination boilers are no different. © HeatandPlumb.com | Pioneer Bathrooms Ltd - Address: 9 Dennis Lane, Stanmore, Middlesex, HA7 4JR | Phone: 0203 113 2122 | Sitemap, Combi boilers have been installed in the UK since, There are approximately 25 major combi boiler manufacturers, There are free standing and wall mounted combi boiler options. Unfortunately, they’re not cheap components to replace. It relies on the fan to push gases up and out the flue, so this needs to be running before the boiler can ignite. So, it might not be reading the readings from the thermistor correctly. Having a boiler or electrical engineer switch the radio frequency channel of the thermostat will fix the problem. These are mechanical parts, and mechanical parts wear out over time. So, you shouldn’t keep resetting your boiler, as continued operation is likely to damage these components, leading to further expensive repair bills. Expect to pay somewhere in the region of £250, and that includes both parts and labour. If the fan isn’t working correctly, the boiler will lock out. That’s going to mean that the NTC thermistor has a short circuit or is faulty. This helps a Gas Safe repair engineer diagnose the fault quickly, so that repair costs are cheaper than if they had to run a full diagnostic on your boiler. Whichever fault diagnosis procedure is used, the objective is always to achieve: It is important to use a logical approach to fixing the boiler and for it to deliver the full capability. Not only does this problem need to be fixed to prevent scalding, it also needs to be done to protect internal boiler components. As we’ve mentioned, a boiler repair specialist can sometimes work the valve loose. If this is the case, the sensor is going to need to be replaced. The thermistors monitor the temperature of water. These are the top 10 most common boiler problems: Common Boiler Problems: Hot water but no heating; No heat or hot water; Boiler is leaking; Boiler is kettling The E20 fault code on Potterton boilers, relates to an NTC thermistor issue in your appliance. Like most boilers from the 90s and 2000s, the Potterton Suprima is easily repaired should it suffer a breakdown. The gas valve could be giving or receiving the wrong signals, or even sticking partially open/closed when it shouldn’t be. Then they have to be fixed and a logical approach to fault finding and repair is essential. This frequent flame failure is potentially dangerous. When your boiler develops a fault, a code will be shown on the display panel. But, it’s not always the ignition lead and probe that are to blame. There could be a problem with the supply of gas. However, on some occasions, parts like the PCB and/or gas valve will need to be replaced. There’s a good chance that they’ve been damaged. If you are having any difficulty getting yours fixed or have been told parts are hard to get, give me a call or send me a text on 07866 766364 for a chat about it.. Follow safe working procedures and always carry out electrical safety checks. The E133 fault code on Potterton boilers is a common one. Many attempts have been made to ease this part of the job for the professional, and the latest boiler fault finding apps could be of some use. If the pump is faulty, replacements can be found from leading brands such as Grundfos. The smallest bit of carbon build-up in the jet, will be enough to limit the flow of gas to a point where the flame can’t stay established. test all external and internal time and temperature controls, and observe firing and shutting down sequence in both central heating and domestic hot water modes. They’ll be able to find and fix the fault. This switch determines whether the fan is working. The most probable cause here, is the gas valve. That means they can discount problems such as the meter, and gas pipework to the boiler. Your boiler repair specialist will also need to analyse the components in your boiler such as the thermistors and PCB. For instance, if a gas hob, cooker or fire still works, the problem isn’t the gas meter. A typical gas valve replacement is likely to be in the region of £300. Sometimes, there can be cross-overs in radio channels between your thermostat, and a neighbour’s. If that’s the case, the fan can be adjusted, so it creates a big enough draught to push gases out of the flue. On some occasions, this is a simple case of a fan speed that is too low. Check that the system has correct polarity. The longer problems like this are left, the more expensive the fix becomes. Common Fault 5: Baxi 105e combi boiler – no hot water. It will be a fault with the fan speed, flue airways, air pressure hose(s), thermistor(s), air pressure switch or its connections, printed circuit board, gas valve, ignition components, or condensate pump. All these components need to be checked unless it is established that the boiler fires in domestic hot water mode but not in central heating mode. Just below, we have a list of common codes related to the Poterton Boiler. If the boiler was to continue operating, it could overheat and damage expensive components. There’s a good chance that old-age has set in, and there’s a problem somewhere in the circuit providing the thermostat with power. This leak could cause further damage. However, if the gas valve is excessively worn, it makes sense to replace it. The offending parts will need to be replaced. My room thermostat is suddently showing A21 error, according to the manual, A21 fault code indicates no RF signal. Typically, the biggest cause of the E270, is a leak in the heating system. The fix here is simple; top up the water pressure by using the external filling loop. The repair of that component(s) often involves replacement on a like-for-like basis and is straightforward in most cases. The E321 fault code on your Potterton boiler, means that there’s a fault with the NTC thermistor. The gas valve is an electronic component, controlled by the PCB. If a fault code or message has appeared on your Ideal boiler, the following information may be useful. That also means, that any parts that have been exposed to water damage, are going to continue to be exposed; you’re risking damage. Air locks in the heating system can lead to poor circulation, as can a build up of heating sludge. Your boiler engineer will be able to check the gas valve to see if this is the case. If the device isn’t paired up correctly, is faulty, or isn’t compatible with your boiler, there are going to be issues. The E40 fault code on your Potterton boiler is another NTC thermistor problem. As well as if the boiler runs and then stops and also if it makes a noise. If it’s the burner, it’s usually a case of a small amount of debris build-up in the jet. Typically, you’d expect to see a boiler’s pressure to be at 1.3-1.5 bar; that’s optimum working condition for most boilers. However, if the problem stems from the PCB, this is going to be an expensive fix. The fault code displayed will indicate the specific type of fault as listed in the manufacturer's instructions. Typically, the cost including parts and labour is going to be in the region of £300. When a Potterton boiler shows the E110 fault code, it means the maximum temperature gradient has been reached; something is causing your boiler to overheat. However, unlike some of the other gas related fault codes, this is an interruption of gas supply within the boiler. Hello and welcome back to all our existing customers, and new entrants to our profession. Your boiler repair company will need to check the whole heating system to find and fix the leak. This could be due to old age, faulty wiring, or water damage. If there’s a problem with the PCB, or with wiring and connections to/from it, the signals could be misleading. Basic Fault Finding Procedure When troubleshooting your Biasi Combi or System boiler please follow the following safety checks need to be done: - Gas Supply: verify basic boiler gas supply, check if it is clean and gas has a free passage. That’s useful information for your boiler service engineer. If there is no display on your control panel, this is a sign that there may be a power outage. This guide is meant for informational purposes only, you should never attempt to fix an issue within your boiler if you aren’t a Gas Safe registered engineer. The gas valve should be closed, but the PCB is still detecting a flame. You’ll need to call a Gas Safe repair engineer. It is important to have adequate understanding to enable recognition of each component, how it works and how it relates to the other components within a combi boiler. This can cause you to control their boiler, and vice-versa. However, when this sensor is faulty, it could be signalling there’s no flame, even when there is. On Potterton boilers, the E384 fault is a false flame. So, if the switch is faulty, it’s going to be feeding back the wrong signals to the PCB and lock out the boiler. As you can see, there are a lot of different problems that can contribute to the E40 fault code being displayed. The first thing your boiler engineer is going to want to do, is determine whether this is a new thermostat, or if it’s been working prior to your current problem. The problem here is with an NTC thermistor in the boiler. It is common knowledge within the industry that many engineers struggle with boiler fault finding, a fact that has been borne out by independent research. If your boiler is showing the E270 fault code, that means there’s not enough water in the system. Central heating fault finding, troubleshooting tips and how boilers work. However, water damage is a different story. Typically, the E15 fault code relates to a command fault. Potterton Suprima Gas Boiler Faults, Problems and Fault Finding. Hissing and banging sounds from your radiators, heating pipes or boiler means that the system is overheating. However, that’s going to mean that the leak hasn’t been fixed. The E135 Potterton fault code is another that’s related to the supply of gas. Your boiler engineer will be able to test this using a multi-meter. Fault finding logic does get easier with practice and as your approach develops. Typically, this is to preserve internal boiler components. Ideal Boiler Fault Finding Information for Vogue Max Combi, Vogue Gen2 Combi, Vogue Max System and Vogue Gen2 System . Check central heating and domestic hot water temperatures, check flow rates, check gas rates, and carry out tightness test if appropriate; plus, check the correct combustion with a flue gas analyser. Share on Facebook. But, there are other common reasons that the E125 is displayed. If the boiler’s flame sensor shows no flame, the boiler will shut off. use fault logic, use safe working practices, use instruments to test signals/ components, prove the fault, and avoid wrong conclusions. If heating sludge is an issue, your heating repair company will need to use chemicals to get rid of this sludge. With gas valves, they tend to stick. It’s common for the wiring and connections between the gas valve and the PCB to be interrupted, so they won’t function in harmony. If it’s a new thermostat, there’s a good chance that the setup process has been completed incorrectly. After all, this is what circulates water from the boiler. 0 Servicing or fault finding on a combi boiler is about learning about many different types of boiler and realising they are all slightly different. In many cases, there may not be a problem with the boiler itself but a problem with the supply. check the meter isn’t blocked or frozen). Valves are known for sticking. But, it also causes what is known as a dry fire. Your heating system is sealed, and it’s the volume of water in the system, that determines pressure. A combi boiler should be serviced regularly, ideally every year, by a competent person and this person must be CORGI registered, as this is the law. You’ll need to press the boiler reset button to clear the code, but only after the boiler has been fixed. That said, your boiler service engineer will want to first check the safety thermostat. Gas Boiler Fault Finding and Repair - Level 1-3. The E384 fault code can be fixed by first, determining the exact cause of the problem. There are hundreds of models and many variations; it is important, therefore, to understand combi boilers collectively. This allows the boiler’s PCB to monitor the appliance’s operation. A boiler repair company will be able to test the PCB, gas valve and all wires/connections using a PCB to determine where the problem lies. If your boiler is losing pressure, it’s likely you have a leak. And, all mechanical components can wear over time. So, instead of working, the boiler will lock out, as a self-preservation technique. When your boiler displays the E09 fault code, it means there is a problem with the gas valve’s connection to the boiler. Your boiler needs to communicate with the thermostat, to know when you have higher/lower demand for heating. Boiler Fault Finder is an easy to navigate, technical support workmate, providing many features such as fault finding & diagnosis, boiler manuals, electrical safety checks, system component testing and sequence of boiler operation. Each section of this guide covers specific fault codes on Potterton boilers, and what you need to do next in terms of servicing and repairs.. For a quick and easy check conduct the following: Electrical. If you know the fault code being displayed on your boiler, you can click the link and read the details on that specific fault code below. Fault finding on combination boilers is about solving the problem. If you’re having a problem with your Potterton boiler, it will be listed in this guide. The root of the problem comes from the boiler overheating. If there seems to be no problem with the gas valve, the next point of call, is the PCB. Follow safe working procedures and carry out electrical safety checks every time. As you can see we have now added more courses with more options for both 1 on 1 days & and standard days. This helps to highlight where the break in the circuit is, and therefore, which part is the culprit. In the case of the E133 fault code, it’s likely that the gas valve is stuck closed, even when the PCB is telling it to open. When they’re not, the fan isn’t able to push harmful gases out of the flue. The issue that’s causing the fault code to be displayed, is low water pressure. The quicker the issue is found and repaired, the more likely it is that a quick and cheap fix is available. If the connections are simply loose, they can be re-secured to clear the E135 fault. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). EPHG LIMITED © 2016 to 2020 © All Rights Reserved, Air locks in the heating system (especially the pump), A pump that’s blocked full of debris, or completely faulty, Blockage in the heating system (such as a radiator, or towel rail). Typically, we find it’s years of boiler vibrations working these connections loose, or a small level of water damage. There must be no equipment or appliance used that you think may be faulty. All these airways need to be clear. This could lead to a gas valve replacement, that can cost £250-300, depending on the exact type of Potterton boiler that you own. To make recognising a fault as straightforward as possible, modern boilers display a digital boiler error code to let you know exactly what’s causing the fault. Once they’ve done so, they can top up the boiler’s pressure, and reset it to clear the fault code. It’s the fan that keeps your boiler operating safely. It’s the PCB that gives the signal to the valve to open, and receives a signal back from the gas valve, to say that is has opened. The first place a boiler repair specialist will start, is the pump. With the huge number of combi boilers installed (about 10 million in the UK) and the variations that can occur, major or minor, it is impossible to specifically describe each and every component for all the different boilers. Increasing the volume of water in the heating system, is going to mean that pressure also increases. The gas valve might not be receiving the signal to open, or, it might be open, even when the PCB thinks it isn’t. The most obvious explanation for this, is that the gas valve is faulty. check the gas valve isn’t sticking closed), and the supply of gas into the boiler (i.e. Below we have listed the main Ideal boilers in domestic use so that you can find your model, find your fault code and then see what the issue is and how it can be fixed. The huge number of combi boilers available means there are millions of variations of components and it is impossible to specifically describe each one. Having verified where the fault is and which component or components is causing the disturbance of the boiler sequence, it can be repaired. Whilst wiring and connections can be replaced, your engineer needs to focus on what has caused the leak in the first place. Your boiler engineer will be able to test this using a multi-meter. This is always the same. Able Skills Boiler Fault Finding & Heating Controls Course is suitable for Gas Safe registered engineers, or those who have undertaken Able Skills Gas Managed Learning Programme.This course is aimed at those individuals who are looking to enhance their practical skills with additional technical knowledge on boiler maintenance, fault finding and repair. Boiler Fault Finding Courses Learn How To Repair Gas Boilers & Heating Faults Becoming a good heating repair and boiler breakdown engineer requires a thorough understanding of the design, operation and fault finding sequence for gas boilers and their respective heating controls. These are extremely important to the engineer and it is vital to always follow the manufacturer's instructions. Instead, it’s the thermostat tripping, causing the boiler’s PCB to think the max temperature has been reached, even when it hasn’t. It’s rarely worth while fixing them, so a replacement is going to be needed. The E134 fault code on Potterton boilers, like the two above, is a gas supply issue. So, the boiler does have the ability to ignite, but something is stopping the flame from being maintained. It controls the flow of gas into the burner, and these levels change when you decrease/increase demand for hot water or heating. The Boiler Fault FInding Solution; Boiler Fault Finder is an easy to navigate, technical support workmate, providing many features such as fault finding & diagnosis, boiler manuals, electrical safety checks, system component testing and sequence of boiler operation. Like all mechanical parts in your boiler, the fan can fail over time. If the fault lies with the thermistor, it’s likely the problem stems from a short circuit, faulty NTC thermistor, or the connections between the PCB and thermistor aren’t secure (or, possibly damaged). If it’s the PCB that is faulty, a replacement will be needed. Do this by: talk to the house owner, attend manufacturers' training courses, read the manufacturers' installation and servicing instructions, talk to colleagues and component wholesaler staff, and keep a written record of combi boilers worked on, the fault, repair, cost of component(s) of the boiler, and time taken. Common fault 4: Strange banging noises. So, finding and fixing the problem early will save you vast amounts on boiler repair bills. Suprima by Potterton, 30-80 and 30L-80L (but NOT Suprima HE). By. heatandplumb.com supplies over 90,000 heating and plumbing products to the trade and public at highly-competitive online prices. This helps your boiler repair company to quickly diagnose what the problem is, rather than having to fault-find every single component in your boiler; the fault code system makes repairs cheaper. Basically, water is not able to circulate around the heating system correctly. use knowledge of the components and operating principles to remove the cause of the fault. Boiler inlet gas pressure level at the gas valve should be set for 20 mbar. Fault Finding & Multimeters Course. When Potterton boilers display the E83 fault code, there’s a problem with room thermostat or timer. Some common overheat fault codes include D1 286, E5 218, E5 332, E9 219 and E9 224. Finally, they’ll want to check the radio frequency you’re running, if you have an RF stat. Firing in domestic hot water mode eliminates all of the above possible faults but now includes the central heating low limit thermostat, diverter valve and time switch, central heating part of the printed circuit board, and room thermostat/programmer etc. And, like the above, it’s likely that the gas valve is stuck closed. The problem can be fixed by flushing out the system using chemicals, and then fitting a magnetic system filter. On most occasions, this is a quick and simple fix; usually, a replacement NTC thermistor is needed. Your boiler service company will be able to check both components using a multi-meter. Typically, the most likely problem is that the NTC thermistor’s connections have come loose due to boiler vibrations, or the unit has failed due to old age. There are traditional and balanced flue options; There are standard efficiency and high-efficiency condensing boiler models, There are a range of outputs for each model, There are a range of models to suit varying budgets, Models change and evolve substantially about every five years. But before getting into the finer details of boiler fault finding, be sure to make sure that you first eliminate the obvious causes. The boiler locks out to protect you, and anyone else in the property. On some occasions, it’s not a physical overheat that’s causing the E110 fault code to be displayed. All boilers, BAXI boilers included, are prone to lockouts from time to time, but this fault has been particularly common with the Baxi Solo 1PF and 2PF over the years. And, a steady flow of gas needs to be provided to the burner. To highlight where the fault public at highly-competitive online prices boilers work found it can be fixed and a and! Loose, or from the boiler no display on your Potterton boiler is another common one 230., relates to a command fault a typical gas valve is stuck.! Is low water pressure of system that illuminates LEDs or neon 's, either on the burner blocked! Is weak, intermittent, or non-existent: Baxi 105e combi boiler is failing in its heating role or.... Compatible with your boiler repair bills repair of that component ( s often. Manual, A21 fault code the idea behind these sensors, is the thermostat will fix the problem, cause! 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